| 钙钛矿透氧膜材料中金属离子价态的化学测定 |
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| 引用本文： | 李其明,李芳.钙钛矿透氧膜材料中金属离子价态的化学测定[J].化学研究,2010,21(4):72-75. |
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| 作者姓名： | 李其明 李芳 |
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| 作者单位： | 1. 辽宁石油化工大学,化学与材料学院,辽宁,抚顺,113001
2. 辽宁石油化工大学,石油化工学院,辽宁,抚顺,113001 |
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| 摘 要： | 建立了钙钛矿材料中金属离子的碘滴定分析方法,并通过该方法对BaCe0.1CoxFe0.9-xO3-δ和BaZr0.1CoxFe0.9-xO3-δ钙钛矿透氧膜材料中钴铁离子价态进行了测定.研究表明,随着钴含量的增加,钴铁离子的平均价态呈下降趋势,这意味着氧空位浓度也在随之增加.对比发现在相同掺杂比例时(x),BaCe0.1CoxFe0.9-xO3-δ体系中钴铁离子的平均价态要低于BaZr0.1CoxFe0.9-xO3-δ系列中钴铁离子的平均价态,因此BaCe0.1CoxFe0.9-xO3-δ系列比BaZr0.1CoxFe0.9-xO3-δ系列拥有更多氧空位数.
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| 关 键 词： | 钙钛矿 透氧膜 碘滴定 价态 氧空位 |
Determination of Valence State of Metal Ions in Perovskite Oxygen Permeable Membrane |
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| LI Qi-ming,LI Fang.Determination of Valence State of Metal Ions in Perovskite Oxygen Permeable Membrane[J].Chemical Research,2010,21(4):72-75. |
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| Authors: | LI Qi-ming LI Fang |
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| Institution: | 1.School of Chemistry and Materials Science,Liaoning University of Petroleum and Chemical Technology,Fushun 113001, Liaoning,China; 2.School of Petroleum and Chemical Technology,Liaoning University of Petroleum and Chemical Technology,Fushun 113001,Liaoning,China) |
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| Abstract: | Iodine titration analysis method was developed to determine metal ions in oxygen permeable membrane made from perovskite,and it was used to determine the valence of cobalt-iron metal ions in oxygen permeable membranes made from perovskites BaCe0.1CoxFe0.9-xO3-δ and BaZr0.1CoxFe0.9-xO3-δ.Results indicate that the average valence of cobalt-iron ions of BaCe0.1CoxFe0.9-xO3-δand BaZr0.1CoxFe0.9-xO3-δ tends to increase with the increase of cobalt doping,which means that more oxygen vacancies are present in perovskite.Comparison shows that,under the same doping dosage（x value）,the average valence of cobalt-iron ions in BaCe0.1CoxFe0.9-xO3-δ is lower than that in BaZr0.1CoxFe0.9-xO3-δ.In other words,there are more oxygen vacancies in BaCe0.1CoxFe0.9-xO3-δ than in BaZr0.1CoxFe0.9-xO3-δ. |
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| Keywords: | perovskite oxygen permeable membrane iodine titration valence state oxygen vacancy |
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